Intro:
  Am      Am        Am7sus4 C         D       Am6       F       E
E-------0---------|-----------------|-----------------|-----------------
B-----1---------1-|-------3-------1-|-------3-------1-|-------1-------0-
G---2---------2---|-----0-------0---|-----2-------2---|-----2-------1---
D---2-------2-----|---2-------2-----|---0-------0-----|---3-------2-----
A-0-------0-------|-----------------|-----------------|-----------------
E-----------------|-3-------3-------|-2-------2-------|-1-------0-------

  Am7     Am        Am7     C         D       Am6       F       E
E-------3-------0-|-------3-------0-|-----------------|-----------------
B-----1-------1---|-----1-------1---|-------3-------1-|-------1-------0-
G---2-------2-----|---0-------0-----|-----2-------2---|-----2-------1---
D-----------------|-----------------|---0-------0-----|---3-------2-----
A-0-------0-------|-----------------|-----------------|-----------------
E-----------------|-3-------3-------|-2-------2-------|-1-------0-------
[ Tab from: https://www.guitartabs.cc/tabs/l/led_zeppelin/babe_im_gonna_leave_you_tab.html ]
First Verse:
  Am7     Am        Am7sus4 C         D       Am6       F       E
E-------3-------0-|-----------------|-----------------|-----------------
B-----1-------1---|-------3-------1-|-------3-------1-|-------1-------0-
G---2-------2-----|-----0-------0---|-----2-------2---|-----2-------1---
D-----------------|---2-------2-----|---0-------0-----|---3-------2-----
A-0-------0-------|-----------------|-----------------|-----------------
E-----------------|-3-------3-------|-2-------2-------|-1-------0-------

These four bars are repeated several times. Then there four bars that
go like this:

I'll leave you when the summertime......

 Bes maj7 F         E7      E
E-----------------|-----------------|------------
B-------3-------1-|-------3-------0-|------------
G-----2-------2---|-----1-------1---|--2x--------
D---3-------3-----|---2-------2-----|------------
A-----------------|-----------------|------------
E-1-------1-------|-0-------0-------|------------

When things get heavier after these nice chords, play:

  Am              Am7  Am#5
E-0----------------3-|-0-----------|---------------------------
B-1----------------1-|-6-----------|---------------------------
G-2--several times-2-|-5-----------|-repeat several times------
D-2----------------2-|-7-----------|---------------------------
A-0----------------0-|-0-----------|---------------------------
E--------------------|-------------|---------------------------

When finally the drums and the dirty guitar come in the chords are:

Am (V) | G(III) | D(II) |  F(I) E